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RFC8287 Sub-TLV Length Clarification

Document Type Replaced Internet-Draft (mpls WG)
Expired & archived
Authors Nagendra Kumar Nainar , Carlos Pignataro , Faisal Iqbal , Sasha Vainshtein
Last updated 2019-03-10 (Latest revision 2019-01-17)
Replaces draft-nainar-mpls-rfc8287-errata
Replaced by draft-ietf-mpls-rfc8287-len-clarification
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd Loa Andersson
IESG IESG state Replaced by draft-ietf-mpls-rfc8287-len-clarification
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to, Loa Andersson <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


RFC8287 defines the extensions to MPLS LSP Ping and Traceroute for Segment Routing IGP-Prefix and IGP-Adjacency Segment Identifier (SIDs) with an MPLS data plane. RFC8287 proposes 3 Target FEC Stack Sub-TLVs. While the standard defines the format and procedure to handle those Sub-TLVs, it does not sufficiently clarify how the length of the Segment ID Sub-TLVs should be computed to include in the Length field of the Sub-TLVs which may result in interoperability issues. This document updates RFC8287 by clarifying the length of each Segment ID Sub-TLVs defined in RFC8287.


Nagendra Kumar Nainar
Carlos Pignataro
Faisal Iqbal
Sasha Vainshtein

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)